Full text: Mapping without the sun

(2) the non-linetype water system update: according to the 
local situation, it is easy to know that the centralized 
pools are mostly fed fishes, and the scattered pools are 
usually ordinary pools. So it is also convenient to do the 
classification. 
Fig.4. Pool 
4.2 Road 
The railway and highway usually have regular shape and 
obvious feature, so it is fit to interpret in the SAR image, but 
the level of the road would be hard to distinguish, it needs to 
complement until the fieldwork annotation. 
Fig. 5 Highway 
Fig.6 Railway 
4.3 Vegetation 
Vegetation includes cultivated land, forest land, grassland, etc. 
In the SAR image, different kinds of Vegetation have different 
texture, as the result, it could be convenient to differentiate 
them. In color, Paddy field is darker than the dry land, due to 
different aquifer effect back scattered coefficients. And fruit 
tree has different scattered feature from cultivated land and 
grassland. The changes could find easily. But the concrete 
category also needs to distinguish by filedwork.
	        
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